[
https://issues.apache.org/jira/browse/HDFS-14622?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Erik Krogen updated HDFS-14622:
-------------------------------
Status: Patch Available (was: In Progress)
> [Dynamometer] State transition err when CCM( HDFS Centralized Cache
> Management) feature is used
> -----------------------------------------------------------------------------------------------
>
> Key: HDFS-14622
> URL: https://issues.apache.org/jira/browse/HDFS-14622
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: tools
> Reporter: TanYuxin
> Assignee: Erik Krogen
> Priority: Major
> Attachments: HDFS-14622.000.patch
>
>
> When we used dynamometer to test HDFS performance, the test encountered a
> error when generate DataNode Block info, then the generation process failed.
> The error stack is
> {code:java}
> Error: java.io.IOException: State transition not allowed; from DEFAULT to
> FILE_WITH_REPLICATION at
> com.linkedin.dynamometer.blockgenerator.XMLParser.transitionTo(XMLParser.java:107)
> at
> com.linkedin.dynamometer.blockgenerator.XMLParser.parseLine(XMLParser.java:77)
> at
> com.linkedin.dynamometer.blockgenerator.XMLParserMapper.map(XMLParserMapper.java:53)
> at
> com.linkedin.dynamometer.blockgenerator.XMLParserMapper.map(XMLParserMapper.java:26)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:151) at
> org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:828) at
> org.apache.hadoop.mapred.MapTask.run(MapTask.java:341) at
> org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:174) at
> java.security.AccessController.doPrivileged(Native Method) at
> javax.security.auth.Subject.doAs(Subject.java:415) at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1690)
> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:168)
> {code}
> After checking Fsimage xml and the source code, I find that *XMLParser* can
> not parse the lines correctly, these lines are like
>
> {code:java}
> <directive><id>8963</id><path>/user/somepath/path1</path><replication>3</replication><pool>cache_other_pool</pool><expiration><millis>1544454142310</millis><relatilve>false</relatilve></expiration>
>
> <directive><id>8964</id><path>/user/somepath/path2</path><replication>3</replication><pool>cache_hadoop-data_pool</pool><expiration><millis>1544497817686</millis><relatilve>false</relatilve></expiration>
>
> <directive><id>8965</id><path>/user/somepath/path3</path><replication>3</replication><pool>cache_hadoop-peisong_pool</pool><expiration><millis>1544451500312</millis><relatilve>false</relatilve></expiration>
>
> <directive><id>8967</id><path>/user/somepath/path4</path><replication>3</replication><pool>cache_other_pool</pool><expiration><millis>1544497602570</millis><relatilve>false</relatilve></expiration>
> {code}
>
> These fsimage xml lines are generated when [HDFS Centralized Cache Management
> (CCM)|https://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/CentralizedCacheManagement.html]
> feature is used.
> I have a discuss with [~xkrogen]
> [here|[https://github.com/linkedin/dynamometer/pull/77]], and some patches
> provided can fix the issue.
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